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Finding the Fourth Proportional to 654,618.78, 903,365.10 and 368,138.70

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Solution

The fourth proportional to 654,618.78, 903,365.10 and 368,138.70 is: 508,026.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,618.78 : 903,365.10 = 368,138.70 : x
  2. Step 2: Convert to fraction form
    654,618.78/903,365.10 = 368,138.70/x
  3. Step 3: Cross multiply
    654,618.78x = 903,365.10 × 368,138.70
  4. Step 4: Simplify right side
    654,618.78x = 332,563,653,539.37
  5. Step 5: Solve for x
    x = 332,563,653,539.37/654,618.78
  6. Step 6: Final answer
    x = 508,026.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.